//无论以 , . / " " 都可以

#include<bits/stdc++.h>
using namespace std;
int main()
{
	string path = "2020,7,7";
	stringstream is(path);
	string tmp;
	while (getline(is, tmp, ',')){
	
		cout << tmp << endl;
	}
	return 0;
}
